OSL-SAR dating of sediments from Brazilian aeolian system: Dama Branca, Rio de Janeiro, morphodynamic study
DOI:
https://doi.org/10.15392/bjrs.v7i2A.688Palabras clave:
OSL-SAR dating, dune mobility, climatic changes, coastal dunesResumen
It has been reported that the formation and stabilization of coastal dune fields in Brazil have a dependence on theclimatic changes, Relative Sea Level (RSL) variations, etc. In this work, a dune field known as “Dama Branca”, located in the town of Cabo Frio, Rio de Janeiro, has been studied to understand its mobility, formation and stabilization. Dating by trapped charge dating techniques as Optically Stimulated Luminescence (OSL) using the Single Aliquot Regenerative protocol (SAR), helps us to understand the formation and dynamics of aeolian systems in Brazil. Samples from two positions; DB and 2DB, were collected from different heights and points for dating. The results obtained by OSL-SAR showed that ages decrease as the height from the dune base increase and older samples are found in deeper horizontal positions. The ages from the base of the studied dunes indicated that its stabilization occurred during the recess of the sea level and that erosion caused by the wind action is revealing an old generation of this dune filed.
Descargas
Referencias
P.C.F. Giannini, A.O. Sawakuchi, R. DeWitt, D.R. Nascimento Jr., V.A.P. Aguiar, M.G. Rossi, Determination of controls on Holocene barrier progradation through application of OSL dating: The Ilha Comprida Barrier example, Southeastern Brazil, Marine Geology, 285, pp. 1-16, 2011
K. Zen Ķeizars, Beth M. Forrest, W. Jack Rink, Natural Residual Thermoluminescence as a Method of Analysis of Sand Transport along the Coast of the St. Joseph Peninsula, Florida, Journal of Coastal Research, Vol. 24, pp. 500-507, 2008
A.M. Cunha, J.W.A. Castro, F.M.B. Pereira, M.A. Carvalho, K. Suguio, Variações do Nível Relativo do Mar Durante o Holoceno na Bacia do Rio Una, Cabo Frio - Rio De Janeiro: Aspec-tos Sedimentológicos, Faciológicos e Geocronológicos, Revista Brasileira de Geomorfologia, Vol 18, pp.143-154, 2017
P. C. F. Giannini, A. O. Sawakuchi, V. R. Mendes; A. Zular, H. A. A. Andrade, C. T. Martinho, C. C. F. Guedes, D. R. Nascimento Jr., A. P. B. Tanaka, M. Fornari, Morfodinâmica de sistemas eólicos costeiros: um modelo baseado em exemplos do Holocénico brasileiro e seu potencial in-terpretativo, Comunicações Geológicas, 101, Especial II, pp. 681-685, 2014
P.C.F Giannini, Sistemas Deposicionais Eólicos no Quaternário Costeiro do Brasil, (Tese de Livre-Docência), Universidade de São Paulo, São Paulo, Brazil, 2007
V.R. Mendes, P.C.F. Giannini, “Coastal dunefields of south Brazil as a record of climatic changes in the South American Monsoon System”, Geomorphology, 206, pp 22-34, 2015
A.G. Wintle, A.S Murray, “A review of quartz optically stimulated luminescence characteristics and their relevance in single-aliquot regeneration dating protocols”, Radiation Measurements, Issue 4, pp. 369-391, 2006
M.J. Aitken, Thermoluminescence Dating, Academic Press, London, 1985
J.A. Durcan, G.E. King, G.A.T. Duller, DRAC: Dose Rate and Age Calculator for trapped charge dating, Quaternary Geochronology, 28, pp. 54-61, 2015
J.W.A. Castro, K. Suguio, J.C.S. Seoane, A.M. Cunha, F.F. Dias, Sea-level fluctuations and coastal evolution in the state of Rio de Janeiro, southeastern Brazil, Anais da Academia Brasi-leira de Ciências, 86(2), pp. 671-683, 2014
H.A.A. Andrade, Evolução Sedimentar e Cronologia da Barreira Costeira Quaternária de Maçambaba: A Influência de Ventos de Rumos Opostos e seu Possível Significado Paleo-climático (Dissertação de Mestrado), Universidade de São Paulo, São Paulo, 2015
R. F. Galbraith, R. G. Roberts, G. M. Laslett, H. Yoshida, J. M. Olley, Optical Dating of Single and Multiple Grains of Quartz from Jinmium Rock Shelter, Northern Australia: Part I, Experi-mental Design and Statistical Model, Archaeometry, 41, pp. 339-364, 1999
R.J. Ângulo, G.C. Lessa, The Brazilian sea-level curves: a critical review with emphasis on the curves from the Paranaguá and Cananéia regions, Marine Geology, 140, pp.141-166, 1997
Descargas
Publicado
Número
Sección
Categorías
Licencia
Derechos de autor 2021 Brazilian Journal of Radiation Sciences (BJRS)
Esta obra está bajo una licencia internacional Creative Commons Atribución 4.0.
Licencia: los artículos de BJRS tienen una licencia internacional Creative Commons Attribution 4.0, que permite el uso, el intercambio, la adaptación, la distribución y la reproducción en cualquier medio o formato, siempre que se otorgue el crédito correspondiente al autor o autores originales y a la fuente, proporcione un enlace a la licencia Creative Commons e indique si se realizaron cambios. Las imágenes u otros materiales de terceros en el artículo están incluidos en la licencia Creative Commons del artículo, a menos que se indique lo contrario en una línea de crédito al material. Si el material no está incluido en la licencia Creative Commons del artículo y su uso previsto no está permitido por la regulación legal o excede el uso permitido, el autor deberá obtener el permiso directamente del titular de los derechos de autor. Para ver una copia de esta licencia, visite http://creativecommons.org/licenses/by/4.0/
